why petroleum is also call as black gold under 60 words
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This is because when crude oil is extracted from the land it is black in color. This resource is compared to gold due to its valuable properties and worth too. Its many components have a lot of commercial value. Such a substance is rare on earth.
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This is because when crude oil is extracted from the land it is black in color. ... Crude oil is jet black before purification but after purification, it turns golden in color; therefore, it's tagged as Gold.
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